Hide the centerlines extending of a center mark and redisplay them when needed.
Hide or Display Centerlines for New Center Marks
- At the Command prompt, enter CENTERMARKEXE.
 - Do one of the following: 
		
- Enter 0 (OFF) to add only a center mark.
 - Enter 1 (ON) to show centerlines that extend from the center mark.
 
 
Hide or Display Centerlines for Existing Center Marks
- If the Properties window is not displayed, select any object. Right-click and select Properties.
 - Select one or more center marks.
 - In the Properties window, under Geometry, set Show extension to Yes or No.